diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/guix.texi | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index e547d469f43..caa6976a828 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -18940,9 +18940,8 @@ gexps to introduce job definitions that are passed to mcron ;; job's action as a Scheme procedure. #~(job '(next-hour '(3)) (lambda () - (execl (string-append #$findutils "/bin/updatedb") - "updatedb" - "--prunepaths=/tmp /var/tmp /gnu/store")) + (system* (string-append #$findutils "/bin/updatedb") + "--prunepaths=/tmp /var/tmp /gnu/store")) "updatedb")) (define garbage-collector-job @@ -18980,6 +18979,12 @@ the job would appear as ``Lambda function'' in the output of @command{herd schedule mcron}, which is not nearly descriptive enough! @end quotation +@quotation Tip +Avoid calling the Guile procedures @code{execl}, @code{execle} or +@code{execlp} inside a job specification, else mcron won't be able to +output the completion status of the job. +@end quotation + For more complex jobs defined in Scheme where you need control over the top level, for instance to introduce a @code{use-modules} form, you can move your code to a separate program using the @code{program-file} procedure of the |